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Computer Networks and Security, Lecture notes of Computer Networks

University of the East, Coloocan (UEC)Computer Networks

Comprises of 12 modules plus 3 special modules. Learn Router and Routing Basics, and introduction to Ethical Hacking.

Typology: Lecture notes

2021/2022

Available from 06/18/2022

vernonde
vernonde 🇵🇭

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All slides are customized by Engr. Vernon Degala. For educational purposes only.All slides are customized by Engr. Vernon Degala. For educational purposes only.
Module 1: WANs & Routers
inspired by Cisco Networking Academy
Computer Networks and Security
CCNA 2: Routers and Routing Basics
ORIGINAL COPY
All slides are customized by Engr. Vernon Degala. For educational purposes only.
Agenda
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Download Computer Networks and Security and more Lecture notes Computer Networks in PDF only on Docsity!

All slides are customized by Engr. Vernon Degala. For educational purposes only.All slides are customized by Engr. Vernon Degala. For educational purposes only.

Module 1: WANs & Routers

inspired by Cisco Networking Academy Computer Networks and Security CCNA 2: Routers and Routing Basics

ORIGINAL COPY

Agenda

All slides are customized by Engr. Vernon Degala. For educational purposes only.

WAN (Wide Area Network)

  • Is a data communications network that connects user networks over a large geographical area.
  • WAN operates at the physical layer and data link layer of the OSI reference model.

WAN Devices

All slides are customized by Engr. Vernon Degala. For educational purposes only.

Router Physical Characteristics 2/

  • External Connection on a 2600 Router

Router LANs and WANs

  • Routers have both LAN and WAN interfaces. Routers are the backbone devices of large intranets and of the internet. Two main functions of a router are the selection of best path and the switching packets to the proper interfaces.
  • A correctly configured internetwork in router provides the following:
    • Consistent end to end addressing
    • Addresses that represent network topologies
    • Best path selection
    • Dynamic or static routing
    • Switching

All slides are customized by Engr. Vernon Degala. For educational purposes only.

Connecting WAN Interfaces

Point-to-Point connection between two computers or Local Area Networks (LANs). It is most secure but expensive. A dedicated circuit path is created between end points. Best example is dialup connections. It is less expensive but call setup Devices transport packets via a shared single point-to-point or point-to-multipoint link across a carrier internetwork. Variable length packets are transmitted over Permanent Virtual Circuits (PVC) or Switched Virtual Circuits (SVC). Disadvantage: Shared media across link

Recap